84920931 has 6 divisors (see below), whose sum is σ = 122663580. Its totient is φ = 56613948.

The previous prime is 84920923. The next prime is 84920939. The reversal of 84920931 is 13902948.

It is an interprime number because it is at equal distance from previous prime (84920923) and next prime (84920939).

It is not a de Polignac number, because 84920931 - 2³ = 84920923 is a prime.

It is a super-2 number, since 2×84920931² = 14423129043813522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84920939) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4717821 + ... + 4717838.

It is an arithmetic number, because the mean of its divisors is an integer number (20443930).

Almost surely, 2^84920931 is an apocalyptic number.

84920931 is a deficient number, since it is larger than the sum of its proper divisors (37742649).

84920931 is a wasteful number, since it uses less digits than its factorization.

84920931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9435665 (or 9435662 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 84920931 is about 9215.2553410093. The cubic root of 84920931 is about 439.5465904396.

The spelling of 84920931 in words is "eighty-four million, nine hundred twenty thousand, nine hundred thirty-one".